求翻译：针对断面面积为81.7 m2煤仓上部卸载硐室断面大、围岩软弱生产地质条件，采用FLAC3D建立了数值计算模型，研究揭示大断面硐室围岩应力、围岩位移及其塑性区分布特征，提出了“加大锚杆锚索支护范围、高预紧力、关键部位强力支护”技术思路，确定了“2.4m锚杆+10.5m锚索+15m锚索”强力支护技术方案。工程实践表明：所采用支护技术方案有效控制了硐室围岩变形破坏。是什么意思？

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Cross-sectional area for 817,000 m2 of the upper compartment uninstall ideal room, of the cross section of the rock weak production geological conditions, with a numerical computing FLAC3D model, large cross section of the ideals enshrined in the study room of rock stress, Wai Yan shift and its char

Is on 81.7 m2 coal bins unloads mountain cave the room cross section in a big way in view of the cross sectional area, the adjacent formation weak production geological condition, used FLAC3D to establish the value computation model, the research has promulgated the big cross section mountain cave r

For section area for 81.7 m2 coal warehouse upper uninstall Chamber room section big, and surrounding rock weak production geological conditions, used FLAC3D established has numerical calculation model, research reveals big section Chamber room surrounding rock stress, and surrounding rock displacem

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